Argon shielding gas is introduced around arc welding to isolate the air in the welding zone and prevent the welding zone from oxidation.
Argon arc welding technology is a kind of welding technology developed on the basis of ordinary arc welding principle. The welding material is protected by argon gas, and the welding material is melted into liquid on the substrate by large current to form a molten pool, so that the welding metal and the welding material can be metallurgically combined. Because argon gas is continuously introduced during high-temperature melting welding, the welding material will not contact with oxygen in the air, which prevents the oxidation of the welding material, so stainless steel and iron metal can be welded.
Extended data:
The working principle of argon arc welding in main circuit, auxiliary power supply, driving circuit and protection circuit is the same as that of manual arc welding. I won't describe it here, but mainly introduce the unique control function and arc initiation circuit function of argon arc welding machine.
Argon arc welding can be widely used mainly because of the following advantages.
1, argon protection can isolate the adverse effects of oxygen, nitrogen and hydrogen in the air on the arc and molten pool, reduce the burning loss of alloy elements, and obtain dense, splash-free and high-quality welded joints;
2. Argon arc welding has the advantages of stable arc combustion, concentrated heat, high arc column temperature, high welding production efficiency, narrow heat affected zone, and low stress, deformation and crack tendency of welded parts;
3, argon arc welding is open arc welding, which is convenient for operation and observation;
4, the electrode loss is small, the arc length is easy to maintain, there is no flux and coating during welding, and it is easy to realize mechanization and automation;
5. Argon arc welding can weld almost all metals, especially some refractory metals and oxidizable metals, such as magnesium, titanium, molybdenum, zirconium, aluminum and their alloys;
6, not limited by the position of weldment, all-position welding can be carried out.